Rotary take-up for sewing-machines.



No. 675,438. Patented Juno 4, l90l. 0. B. BRUSH & S. BURTON.

ROTARY TAKE-UP FUR SEWING MACHINES.

(Application filed Jan. 26, 1901.)

(No Model.)

HHII 1 iizvcesses t Even/Zora, .bd/ W/MUM/ 5 w C V Wgj UNITED STATESPATENT OFFICE.

OTIS B. BRUSH, OF BRIDGEPORT, CONNECTICUT, AND STOCKTON HORTON, OFPROVIDENCE, RHODE ISLAND, ASSIGNORS TO IVIIJLCOX d: GIBBS SEIVINGMACHINE COMPANY, OF NEXV YORK, N. Y.

ROTARY TAKE-UP FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 675,438, dated June 4,1901.

Application filed January 26,1901. Serial No. 44,8511] (No model.)

To (all It-71.0722 it 17mg con/037 12:

Be it known that we, OTIS B. BRUSH, a resident of Bridgeport,Connecticut, and STOCK- TON BORTON, a resident of Providence, RhodeIsland, have invented a new and useful Improvement in Rotary Take-Upsfor Sewinglrlachines, which invention is fully set forth in thefollowing specification.

This invention relates more particularly to rotary take-ups such as usedin the \Villcox d3 Gibbs lock-stitch sewing-rnachine. These machines areconstructed with a view to being run at a high rate of speed, themaximum being about four thousand stitches per minute. The rotarytake-up is mounted on the main shaft in the head of the machine, and themovements imparted thereby to the thread are extremelyrapid. \Vhen thethread breaks at the needle, the machine often runs for a considerabletime before the break is noticed and the machine can be stopped. In suchcases the take-up continuing to draw thread from the spool accumulates alarge mass thereof, which becomes entangled, involving a loss of timeand a wastage of thread.

One object of the present invention is to minimize the inconvenience andwaste resulting in such cases, and this object is accomplished by theimprovements hereinafter de- 0 scribed. The rapid revolution of thetakeup creates a strong current of air, which is annoying anddisagreeable to the operator.

A further object accomplished by the invention is to shield the face ofthe operator 55 from such air-currents.

Figure 1 is an elevation of the head of a lVilloox & Gibbs lock-stitchsewing-machine. Fig. 2 is a left-hand side View of the thread guard andcutter. Fig. 3 is a sectional plan view illustrating the thread-cutter.Fig. 3 is an elevation of the thread-cutter from the right-hand side.Fig. 4: is a bottom plan view of the thread-guard. Figs. 5 and 6 aredetails illustrating different forms of thread- 5 cutters.

The rotary take-up 10, having the take-up pin 11, is of wellknownconstruction, requiring no description. The thread 12 is carried fromthe eye or thread-tube 14 to the take-up,

passing around pin 11, and thence to the needle 15. For the purpose ofcarrying a cutter and thread-guide and to divert the air-current createdby the rapid movement of the take-up, so that it will not strike theface of the operator, we provide a guard 16 in the form of a circularband entirely surrounding the take-up plates 10 10. This band isdetachably secured by the clamp 17 to post 18 on the head of themachine. The rim of band 16 is partly cut away at the upper right-handside 19, so that any slack thread will protrude through this opening,where there is nothing to engage or catch it while sewing. The cut-awayportion of the guard begins at a point adjacent to the thread-eye l4 andextends upwardly for a distance of about ninety degrees. The width ofthe cut-away portion is about half the width of the band. The advantageof having the narrow portion of the guard remain at this point betweenthe head of the machine and the inner take-up plate is that when thethread breaks (which is when the outer take-up pin 11 draws it tightbetween the tension and the material) its end tends to fly upward and ifunguarded is carried down behind the take-up by a current of air andwound around the spindle or needle-bar crank, to which the take-up isfastened. The take-up in the machine shown rotates toward the operatorat the bottom. The opening 19, formed by this cutaway portion, servesanother purpose in connection with the thread-cutter 20, which is placedat the lower extremity thereof and is formed by a vertical ornearly-vertical slot or notch in the thread-guard. In case of breakageof the thread at the needle the centrifugal force due to the rapidrotation of the take-up often throws the broken thread outward throughthe opening 19; but frequently the thread go drops back on the take-upand is carried down with it. If the break is a long one, the thread willwrap around the pins in the take-up, and when sufficient friction iscreated-about two or three wraps-the thread will be drawn against thecutter with sufficient force to sever it between the eye 14 and thetake-up. This immediately arrests the drawing off of thread from thespool.

The thread-cutter 20, as shown in Fig. 5, has I00 a sharpened edgetransverse to the band or formed at 20.

As shown in Fig. 5, the thread-cutter may be formed by sharpening thecurved edge 20, giving a knife-cut as the thread is drawn across it.

The thread cutter could obviously be formed in other ways; but thosedescribed have been found best suited to the purpose.

As in former constructions, the thread passes out of the take-up throughan oblong guide, in which the thread vibrates back and forth, but whichrestricts the range of its vibratory movement. This guide was heretoforea separate piece attached to the head of the machine. According to thepresent invention this guide 24 is formed in the band or guard 16, whichsimplifies the construction.

What we claim is 1. The combination with the rotary takeup of athread-guard in the form of a circular band surrounding the take-up, therimof the band having a portion of its width cut away on one side toprovide an opening through which loops of slack thread may protrude.

2. The combination with the 'rotary takeup and With the eye or guidethrough which the thread passes to the take-up, of a guard in the formof a band surrounding the takeup and having part of its Width cut awayat a point adjacent to said thread eye or guide.

3. The combination with the rotary takeup, of a thread-cutter forsevering the thread in advance of the take-up in case of breakage of thethread between the take-up and the work.

4:. The combination with the rotary takeup, of a thread-cutter againstwhich the rotation of the take-up will draw the slack threadaccumulating after breakage thereof between the tension and work.

5. The combination with the rotary takeup, of a threadcutter arrangedadjacent thereto and comprising a slot or notch oblique to the directionof the thread, and a cutting edge.

6. The combination with the rotary takeup, of a thread-guard in the formof a band, and having a thread-cutter formed thereon.

7. The combination with the rotary takeup, of a thread-guard in the formof a band surrounding or partly surrounding the takeup, and havingformed therein an oblong slot extending lengthwise of the hand throughwhich the thread passes from the tension to the needle.

In testimony whereof We have signed this specification in the presenceof two subscribing witnesses.

OTIS B. BRUSH. STOCKTON HORTON.

\Vitnesses as to Otis B. Brush:

J. O. HANLEY, J. PARMLY.

Witnesses as to Stockton Borton:

J. B. SEDGWIOK, R. N. CHAPMAN.

